Move the cups Experiment

Instructions:

Find two disposable cups and some string. Cut the string into two 30 cm pieces. Using tape, attach the end of one piece of string to the bottom of one of the cups, and attach the other end to the edge of a table. Repeat this with the other cup. Position the cups so they hang off the table 4 or 5 cm apart, and at the same height. You might need to adjust the spacing between the cups. Blow between the two cups and see what happens?

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